Electrical connection for hose-couplings.



No.'873,940. PATENTED DEC. 17, 1907. F. HOFFMAN. ELECTRICAL GONNEGTION FOR HOSE COUPLINGS.

APPLICATION FILED JUNE 30. 1906.

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UNITED STATES FREDRICK HOFFMAN, OF CINCINNATI, OHIO.

ELECTRICAL CONNECTION FOR HOS E-CCUPLIN GS.

Specification of Letters Patent.

- Patented Dec. 17, 1907.

Application filed June 30. 1906. Serial No. 324.172.

To all whom it may concern:

Be it known that I, FREDRICK HOFFMAN, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Electrical Connections for Hose-Couplings, of which'the following is a specification.

This invention relates to a telephone sys tem adapted to be used by fire engine companies for use in fires, and the object of the invention is the extending of the wires through the different hose sections and coupler construction by means of which the wires forming the telephone circuit will be con nected together whenever two or more sec tions of hose are coupled.

I am aware of the fact that electrical wires have been heretofore run through hose sections, but they have been so placed that in order to operatively connect up the wires of i one section with those of another, it was necessary that the couling members should be very tightly locked: and no allowance was made for wear on the couplers, nor to the fact that very often in the hurry of getting the hose line in position, one coupling member will be only partially threaded over orinto the co-acting member, and in such cases, there has, of course, been a break in the circuit.

My invention consists of the novel features of construction and combination of parts hereinafter described, pointed out in the claims, and shown in the accompanying drawings, in which,

Figure 1, is a side elevation of a portion of two hose sections, pieces of the coupling members being broken out and shown in sections. Fig. 2, is an enlarged longitudinal sectional view, taken through a cou ling sleeve and end section of the hose. Fig. 3, is a transverse section on the line 33 of Fig. Fig. 4, are detail perspective views of contact rings carried by the coupler members.

In the drawings 1 and 2 represent the connecting wires which complete the circuit between the telephone, the phone wiring being, of course, the usual or any desired arrangement. The wires A and B are placed in the hose sections C and are, of course, suitably insulated and lie between the inner and outer layer composing the hose. I provide also co-acting coupler members D and D each of which carry suitable sleeves D In Fig. 3, I have shown the manner in which the hose section C is secured in said sleeves. Each sleeve is interiorly threaded as shown at D and a flanged collar of ring E is threaded into the sleeve and the second ring E also interiorly threaded andflangedis sli ped partially through the ring E, bringing tlie flanges or the two rin stogether. The sleeveFhavin a reduced en portion F exteriorly threaded has the portion F threaded into the ring 11-, and the hose C is fitted over the sleeve F which sleeve is also provided with a plurality of ribs F which serves to hold the hose C from slipping u on the sleeve F. When the parts are asscm led in position, the hose C is gripped between the sleeves D? and F.

The Wires A and B suitably insulated are embedded within the hose C, being carried between the body portion of the hose proper and the inner lining C. Within the coupler member D is secured aring G, which ring is insulated by the ring of insulating material H from the middle part of the coupler member and the ring G is split transverselyat opposite points forming the ring into two semi-cylindrical sections which are insulated from each other by any suitable insulating material H Each section of the ring G is provided with forwardly projecting lips G. The wires A and B running through the hose C connected to the coupling member D are secured respectively to the sections of the ring G, by soldering or in any other convenient manner. The coupling member D carries a ring J also split to form two sec tions and this ring is insulated from the coupling member by a of insulation J and the two sections of the ring J are insulated from each other by insulating material J Wires A and B carried by the section of the hose to which the coupling member D is connected are also secured to the sections of the ring J. Within the coupling members D and D coupled together, the lips G1 of the ring G will project into and bear against the inner faces of the sections forming the ring J. It will be obvious therefrom that it is only necessary to thread the couplers together sufficiently to bring the lips G into contact with the sections of the ring J to complete the electrical connection between the wires carried by the two connecting hose lengths.

The operation of the device, it is thought,

will be clear from the above description of the construction of the parts and the manner in which they are assembled together when 1 draw the couplers D and D together.

in working order by means of the coupling member. herein described, a continuous electrical connection can be maintained between the telephone apparatus mounted upon the truck or engine, and the telephone apparatus carried by the hose nozzle.

The usual tire collar K is employed to Raised arrows L and M are formed on the coupler members and when brought into the position shown in Fig. 2 indicate to the firemen that an electrical connection has been established between the hose sections.

What I claim is A device of the kind described, comprisin coupling members, hose sections connecte thereto, electric wires carried by said sec FREDRIOK HOFFMAN.

Witnesses:

THOMAS OMEARA, LOUIS J. HOPPE. 

